Overview
In the ever-evolving landscape of cybersecurity, vulnerability management is crucial for maintaining the security and integrity of systems. One such vulnerability, identified as CVE-2025-40735, has been found in all versions of SINEC NMS before V4.0. This vulnerability can expose systems to SQL injection attacks, providing an avenue for unauthenticated remote attackers to execute arbitrary SQL queries on the server database. As such, it is a significant threat to any organization using these versions of SINEC NMS, potentially leading to system compromise and data leakage.
Vulnerability Summary
CVE ID: CVE-2025-40735
Severity: Critical (8.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
SINEC NMS | All versions < V4.0 How the Exploit Works
The CVE-2025-40735 exploit targets a specific vulnerability in SINEC NMS which allows an attacker to inject malicious SQL queries into the server database. Through this, an attacker could manipulate the database to reveal sensitive information, modify data, or even gain administrative access. This is possible due to improper input validation in the affected versions of SINEC NMS, allowing unfiltered data to be interpreted as SQL commands.
Conceptual Example Code
The code sample below illustrates how an attacker might exploit this vulnerability using a crafted SQL injection payload:
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
username=admin'; DROP TABLE users; --&password=12345In this example, the attacker crafts a malicious POST request where the ‘username’ parameter includes a payload that could potentially remove an entire table from the server’s database (‘DROP TABLE users; –‘). The ‘password’ parameter is also included in the request but is irrelevant to the attack. This is just a conceptual example, and the actual exploit would depend on the structure of the target’s database.
Mitigation Guidance
To mitigate the risk posed by this vulnerability, users are advised to apply the vendor patch, which provides a fix for the issue. In cases where applying the patch is not immediately possible, users can employ a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as temporary measures. These tools can help filter out malicious SQL queries and alert the user of potential SQL injection attempts. However, these are not long-term solutions and do not replace the need for patching.